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simplify 36^(-1/2)

1/6 - we can split 36^(-1/2) into 36^(-1*1/2) this way we can apply what we know about basic power rules to split up the problem into more familiar chunks.x^(1/2) means we take the square root of x and x^(-1...
GB
Answered by George B. • Maths tutor
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Prove that the square of an odd number is always 1 more than a multiple of 4

First, we need to define what an odd number is. An odd number can be expressed as the product of 2n+1, where n can be any whole number bigger than 0. You can check this by inputting a few numbers for n (say ...
ED
Answered by Emanuel D. • Maths tutor
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Solve 7x-5>22-2x

9x>27X>3
LP
Answered by Lucy P. • Maths tutor
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Expand the following expression and simplify: (3x+2)(4x+5)

12x 2 + 15x + 8x + 10 = 12x 2 + 23x + 10
PD
Answered by Priscilla D. • Maths tutor
5475 Views

A car depreciates at 8% per year. The initial price of the car is £25,000. How much will the car be worth after 4 years? After how many years will the car be worth less than £14,000?

This problem is all about compound interest except this time the value is going down not up. To increase a value by 8% you would multiply it by 1.08 as 8% is 0.08 (1+0.08). To decrease a value however you ne...
HT
Answered by Hannah T. • Maths tutor
8508 Views